Linked products & Embedding Youtube

Hi, just some quick queries regarding woocommerce (we’re using 2.6.4) please:

1. in the “Linked products” section & the “up-sells” box. If we add products here we get three products that were already there by default as well as the ones we’ve added.. How can we get rid of the three defaults.. or overide them with our choices?

2. Im trying to embed a youtube clip in the product short description area but cant get it to appear in the listing, only a text version of the link appears there… If i add it to the first box in the products backend it does embed, but then the video appears in the details tab of the listing rather than the general tab, which is where i want it..

thanks